Summary

In this randomized, prospective clinical study a plano-convex (plano-posterior) intraocular lens (IOL) with a laser ridge was compared with a plano-convex (plano-posterior) IOL without laser ridge. The 100 patients (100 eyes) with senescent cataracts all underwent ECCE performed by the same surgeon from November 86 to March 87. The operative technique consisted of capsulorhexis, irrigation-aspiration and in-the-bag- implantation. The first group of 50 patients (50 eyes) received the sort of IOL without a laser ridge and the second group the sort with a laser ridge. Our prospective five year clinical study is not yet complete and no Statistical analysis has been performed. As an intermediated result however we have found 37.0% secondary cataracts in the group with an IOL without laser ridge and 28.6% in the group with an IOL with laser ridge.